Spatial and temporal patterns of distribution of major fish species and catch rates of selected fishing gears in Bolinao, Pangasinan

Date

4-2003

Degree

Bachelor of Science in Biology

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Vincent V. Hilomen

Abstract

MANEJA, ROMMEL HILOT. University of the Philippines Los Banos. April 2003. Spatial and temporal patterns of distribution of major fish species and catch rates of selected fishing gears in Bolinao, Pangasinan. Adviser: Dr. Vincent V. Hilomen Fish catch data from three types of municipal marine fisheries in Bolinao, Pangasinan were monitored to determine spatial and temporal patterns of distribution of major fish species and catch rates from January 2002 to January 2003. A total of 3,737, 316 and 303 fishing trips were recorded for hook and line, bottom set long line and drift gill net during the study period, respectively. The catch per unit effort (CPUE) were 2.91 kg/man-hr for hook and line aided by a fish aggregating device (FAD) at the open sea area west-northwest of Bolinao, 1 kg/man-hr and 0.82 kg/man-hr for bottom set long line in the forereef slope and seagrass beds near Brgy. Balingasay, respectively, and 0.68 kg/man-hr for drill gill net between Santiago Island and Brgy. Guigiwanen. Except for hook and line, catch rates of the two other gears were generally low suggesting a poor state of remaining fish stock biomass in the area. The relatively high catch rate for hook and line is attributed largely to effects of FAD, the effects of which can be adverse in the long term. An examination of the temporal trends of catch rates showed that catch rates did not significantly vary over time for all three gears, except that for June, July and August 2002 for the hook and line fishery. The catch rates obtained in June and July 2002 were significantly higher than that in August for hook and line fishery. Thunma obesus, Coryphaena hippurn.s., and KOIS7IWOMIS pelamis comprised 85.88% of the total catch (55,689.2 kg) for hook and line, while Lethrinus spp. and Luljamis argentimaculatus (83.3% of 2090.7 kg at the forereef slope and 86.08% of 150.1 kg near Brgy. Balingasay) dominated catch composition for bottom set long line A mixed catch of small sized individuals belonging to Lethrinidae, Lutjanidae, Siganidae and Leiognathidae (54.23% of 582.1 kg) dominated catch for drift gill net. The proportion of the contribution of the major species to the total catch varied between months. The CPUE values were also used to assess the status of the fish stock biomass exploited by the selected gears in the different fishing grounds in Bolinao. Implications to management of stocks are discussed

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

Thesis

Document Type

Thesis

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